Sound box



April 22 1924. 1,491,745

' A. P. FRANGIPANE SOUND BOX Filed Sept. 23, 1921 Patented Apr. 22, laza.

- UNITED srrss tiara PATENT oFFics. j

'ANTHONY r. raanerrann, or xrnesriann, new anasnv, ssrenoa TO WILLIAM J.

BAUER, or NEW YORK, N. Y.

SOUND BOX.

Application filed September 23, 1921.

T all whom it may concern:

Be it known that I, ANTHONY P. FRANGI- PANE, a resident of Kingsland, Bergen County, State of New Jersey, and a citizen of the United States of America, have invented certain new and useful Improvements in Sound Boxes, of which the followingis a specification.

This invention relates to improvements in sound boxes for phonographs, one of the objects being to provide means to vary the tones; in other words, to soften the tones at will and to a desired degree. To carry out my inventiomI provide a device or element to restrain the vibrations of the stylus arm, or arm which imparts vibration to or receives same from a'needle. My improved vibration restraining device is adjustable longitudinally of the stylus arm in order that it can be caused to contact with the restraining element to a desired extent. My improved device can be incorporated with a sound box or may be in the form of an attachment.

I will now proceed to describe-my invention in detail, the novel features of which I will point out in the appended claim, reference being had to the accompanying drawing, wherein :Y

Fig. 1 illustrates a top plan view of a sound box provided with my improvement;

Fig. 2 is a sectional view thereof, partly in elevation, the section being taken on line 22 in Fig. 1;

Fig. '3 is an enlarged sectional detail view, the section being taken on line 3-3 in Fig. 1;

Fig. 4 is a similar view, the section being taken on line 41 in Fig. 1;

Fig. 5 is a top plan view of a modified form of my invention; and i Fig. 6 is a side view thereof.

As herein arranged, my invention consists of a bridge or guide 7 arranged to extend diametrically of a sound box 8 in parallelism with the stylus arm 9. The bridge 7 in this instance is made up of two parallel rails 10 acting as guides for a block 11 slidable longitudinally of the bridge 7. The block 11 is provided with longitudinally disposed rabbet grooves 12 to receive the rails 10. To operate the block 11 longitudinally of the bridge 7, and arm 9, I provide a gear 13 engaging a rack 14: cut in the block 11.

Serial No. 502,653.

The gear 18 is carried by a shaft 15 rotatably I supported by a lug 16 extending from a rail 10. wheel 17, the hub 18 of which is recessed as at 19 to receive a spring 20. The spring 20 acts to take up any slack that may exist,

thereby preventing chattering or rattling of the gear 13 and its associated parts. The bridge 7 may be secured to the sound box 8 by screws 21 or it may be constructed as The shaft 15 carries a thumb-.

illustrated in Figs. 5 and 6 so that it can be attached to sound boxes of various diameters. When arranged for attachment to sound boxes of various diameters, the bridge portion 22 (Figs; 5 and 6) will be provided with brackets 23, 24 and 25, each carrying a set screw 26 by which means the bridge can be attached to various sound boxes. In other respects "the two forms are identical.

To restrain. the vibrations of the arm 9,

I provide block 11 with a pad 27 slotted longitudinally thereof as at '28 to receive arm 9, as indicated in Figs. 2 and 3. While vibrating, the sides of the arm 9 .will rub against thesides of the slot 27, which will so be made of some soft materiahsuch as felt or rubber. The pad 27 acts the same as a mute for a violin; as a matter of. fact, it'is 1 amute. The pad or mute'27 can be caused to engage arm 9 to any'desired extent by adjusting the block 11 longitudinally of the arm 9, by manipulation of thumb wheel 17. The greater the surface engaged by the mute, the lower the tones will be. In

rier slidably mounted on said bridge, a filling in said carrier adapted to engage the opposite sides of said stylus arm, and means for moving said carrier longitudinally of said stylus arm, whereby a varying length of stylus arm may be in contact with said felt filling.

ANTHONY P. FRANGIPANE. 

